Travis has hired a music teacher who will come to his house to give him trumpet lessons. For each lesson, the music teacher charges $20 for Travis to borrow a trumpet in addition to charging $35 per hour that the lesson takes. Based on this
information, determine the rate of change for the cost function for the trumpet lesson.
llars per hour

depends what are you allowed to do ?

to find the unit price of an object, you divide the price by object. you are trying to find out how much an object cost per unit.

for instance, lets say you have 50lb of ice cream(object) that cost 8.00 dollars(price). to find the unit cost, we take the 8.00 and divide it by 50, which will give us .16 cents per pound. we can check this by multiplying .16 by 50 = 8.00

so

object = e2

price = d2

unit price = c2

formula for c2:

=d2 / e2

so in my example about ice cream, we would have the following.

e2 = 50

d2 = 8.00

c2 formula:

=d2 / e2